197 research outputs found
Impact of Contrast Modification on Human Feeling: an Objective and Subjective Assessment
No full textImages are powerful means of communication. Adding images to documents, websites, magazines, helps attracting the attention and providing an immediate feeling about the content of the document itself. At the same time, images can be used to influence the attitude of the reader. In the digital era it is easier than ever to create and share multimedia documents making extensive use of visual data. Furthermore, it is extremely easy to modify and adapt the images in order to make them more suitable to convey a concept. These modifications may simply consist in focusing the attention on a specific part of the image, to heavier manipulations such as changing the visual appearance or the contents to bias the opinion of the observer. This creates a rising interest for the availability of automatic blind tools able to detect possible modifications of images, and to correlate these modifications with the relevant impact on the viewer. This paper proposes an example of application of these concepts that exploits a tool for automatic detection of contrast modifications and analyzes their impact on human feeling. The results of instrumental and subjective studies are presented and discusse
La Vita S. Rosaliae di van Dyck nella Biblioteca della Fondazione Sicilia
No full textThe essay examines the Vita S. Rosaliae, a very rare collection of engravings taken from drawings by Antoon van Dyck, identified by the author and Maria Concetta Di Natale in the Sicily Foundation Library during preparatory research for the realisation of the exhibition 'The Ecstasies of Saint Rosalie - Antoon van Dyck, Pietro Novelli, Mattia Preti, Luca Giordano'
Cocycle deformations and Galois objects for semisimple Hopf algebras of dimension p3 and pq2
No full textArtículo finalmente publicado en: Mejía Castaño, A., Montgomery, S., Natale, S. L., Vega, M. D. y Walton, C. (2018). Cocycle deformations and Galois objects for semisimple Hopf algebras of dimension p3 and pq2. Journal of Pure and Applied Algebra, 222 (7), 1643-1669. https://doi.org/10.1016/j.jpaa.2017.07.016Fil: Mejía Castaño, Adriana. Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Departamento de Matemática; Brazil.Fil: Montgomery, Susan. University of Southern California. Dana and David Dornsife College of Letters, Arts and Sciences. Department of Mathematics; United States of America.Fil: Natale, Sonia Luján. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.Fil: Natale, Sonia Luján. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina.Fil: Natale, Sonia Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Estudios de Matemática; Argentina.Fil: Vega, Maria D. United States Military Academy. Department of Mathematical Sciences; United States of America.Fil: Walton, Chelsea. Temple University. College of Science and Technology. Department of Mathematics; United States of America.Let p and q be distinct prime numbers. We study the Galois objects and cocycle deformations of the noncommutative, noncocommutative, semisimple Hopf algebras of odd dimension p3 and of dimension pq2. We obtain that the p + 1 non-isomorphic self-dual semisimple Hopf algebras of dimension p3 classified by Masuoka have no non-trivial cocycle deformations, extending his previous results for the 8-dimensional Kac-Paljutkin Hopf algebra. This is done as a consequence of the classification of categorical Morita equivalence classes among semisimple Hopf algebras of odd dimension p3, established by the third-named author in an appendix.info:eu-repo/semantics/submittedVersionFil: Mejía Castaño, Adriana. Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Departamento de Matemática; Brazil.Fil: Montgomery, Susan. University of Southern California. Dana and David Dornsife College of Letters, Arts and Sciences. Department of Mathematics; United States of America.Fil: Natale, Sonia Luján. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.Fil: Natale, Sonia Luján. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina.Fil: Natale, Sonia Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Estudios de Matemática; Argentina.Fil: Vega, Maria D. United States Military Academy. Department of Mathematical Sciences; United States of America.Fil: Walton, Chelsea. Temple University. College of Science and Technology. Department of Mathematics; United States of America.Matemática Pur
Discrimination between computer generated and natural human faces based on asymmetry information
No full textPublication in the conference proceedings of EUSIPCO, Bucharest, Romania, 201
Concealment of visual effects of image transmission errors by a sketch-based recovery approach
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